Many generator designs use electric current flowing through windings to produce the magnetic field on which the motor or generator operates. This is in contrast to designs that use permanent magnets  to generate this field instead. Such devices may have a minimum working voltage, below which the device does not work correctly, or does so at greatly reduced efficiency. Some will disconnect themselves from the circuit when these conditions apply. The effect is more pronounced in doubly-fed induction generators  (DFIG) , which have two sets of powered magnetic windings, than in squirrel-cage induction generators which have only one. Synchronous generators  may slip and become unstable, if the voltage of the stator winding goes below a certain threshold.  In a grid containing many distributed generators subject to disconnection at under voltage, it is possible to cause a chain reaction  that takes other generators offline as well, which leads to a cascading failure.

In order to prevent a cascading failure, LVRT testing is mandatory for inverter controllers of wind power generation systems. But such kind of testing platform is hard to build because of its high power and huge expense. However, Hardware in the Loop, HIL simulation system provides a feasible way to finish LVRT testing for the controller.

StarSim Solution

ModelingTech leverages StarSim real-time simulation technology and high-performance Xilinx FPGA hardware  to provide users a high-speed, accurate, stable and esay-to-use simulation paltform in different research fields.